Sand conditioner



Oct. 17, 1933. R. H. MQELROY ET AL SAND CONDITIONER Filed Feb. 1, 1932 4 Sheets-Sheet 1 INVENTORS R0! H. MQELROV, JLROBERT PAPE,

A $4 ATTORNEYS BY m Fm Mn Oct. 17, 1933. R H, McELROY ETAL 1,931,150

SAND CONDITIONER Filed Feb. 1, 1932 4 Sheets-Sheet 2 ROY H, MSELROY,

Lg 1. ROBERT PA PE,

Oct. 17, 1933.

R. H. MCELROY ET L 1,931,150

SAND CONDITIONER Filed Feb. 1, 1932 4 Sheets-Sheet 3 INVENTORS ROY H.M ELR0Y' BY 1:. ROBERT PA PE, m, A

ATTORNEYS um- T Oct. 17, 1933. R. H. McELROY ET AL SAND CONDITIONER I Filed Feb. 1, 1932 4 Sheets-Sheet 4 Jrvwmou ROY H. M EILRO LROBERT PAPE,

Patented Oct. 17, 1933 UNITED STATES- P-A SANDCON fi -E If] i Roy. HQMcEli-oy and Louis'Robert rape; bato to. ZS. Simpson; Chicago, 1 Application February i, 1932. S eria l No. semjossfff ,s'oiamisg(01. 8345):F' .v o isboltedby m; was 21401 1 tomge, (tall-innit) invention relates tomullers.

It is the object of the invention to provide a muller construction in which thedegreeof vertical movement of the muller" can belirnited tedifierent degrees depending upon the mate rial being mulled while the mullers are rotating on their own axes and bodily about the .cen-

It is a further object to provide a 'series of cooperating scrapers adapted toIthrow the mate'- rial being mulled and to turn thematerial and to operatein different zones of theimaterial so as to move the material constantly inthe pamor thermullers where it is mulled. A i

It s afurtherobject to provide such scrapersin such a position with such an adjustment that they may be quic ly and easily replaced without interfering with the rest of the 'mechanism.

- ltjis a further object to provide a muller pan having a removable bottom so arranged that it maybe removed in sections and such removal and replacement be effected with the minimum of disturbance of the mulling a mechanism. 7 Referring tothedrawmgs: 7 a

Figure 1 is a side elevation of the muller with the pan partially in section and the side walls partiallylbroken away; r ,Figure 2 is a top planview of the muller} Figure 3 is asection on theline 33 thereof; Figure 4 is a section on the line of IF" ig'- ure 2 showing the particular constructioneof the muller shaft. i Referring vto the drawings in detail, l -l indicate legs joined together by the cross members 2 which support the vdrivingshaft 3 which car ries the driving pinion 4 engagingthe master driving gear 5 which is attached to the central column shaft 6. This shaft is provided with a shoulder 7 so that it rests upon' the roller'bear; ings 8, which roller bearings are in turn sup ported within the chamber 9 formed by the central, upwardly-extending column 10 that is an integral part of the base 11 forming the bottom of the muller pan. A depending co1lar 1 2 is integrally formed on this bottom; 11 andhas an inwardly-extending shoulder 13 on which rests the bearing 8. Within this collar 13 is a lubricant sealor packing 14. l n l o The column 6 is provided with a second upper spaced shoulder 15 aroundlthe margin of which is a second lubricant seal 16 carried-:on the {collar 17of the column 10', On' the top of the shoulders 15 is a secondroller bearing la which is supplied with lubricant from the lubricant chamber 19 formedby the cap.20 which The chamber, 9'. is; supplied with lubricant through the lubricant passageway 22 in the shaft ;6 and the chamber;,-19 is supplied with lubricant through'the, lubricant passageway 23 in thejshaft '6. "The collar 17,;which rests ,upon 1 barrier or partition between the two chambers-9 and 19. I In order to further; protect; the bearings, there is I provided. an external collar vor sleeve 24 having an' outwardly. and downwardly extending skirt 25. This sleeveissupported on the shou1- der 26 on, the shaft 6 and extends downwardly,

outwardly and over the cap 20. 1 i

The mullenpan which ,is provided with the eReturning the muller pan, it will .be ob- I served that thejbottom 11 is provided withan external. flange 34 which is bolted by the bolts 35 to azsidex-wall structure consistingof the sheet 36shaving an upper reinforcing'flange 37 Returning to the sleeve 24,it will be.v observed that it is; provided with oppositely-extending arms 38and '39 having eyes'40 andz4lyin the ends thereof-carrying the shafts 42 and 43 which arekeyed by keys 44 to the arms 38 and 39. Mounted on each of these shaftsqis oneend of one of the muller arms 45 and 46 carryinggthe mu1le'rs47 and" 48- on the outer ends thereof. The other'endsofthe arms-45 and 46 have pad ends 49 and 50respectively which are engaged byfthe adjusting screws, 51- and 52 carried in the stationary arms 53 and 54 :whichare mounted on the square ends 55 of the'shafts 42 and 43 respectively. In other words); the arms 45 and 46 freely rotate on'their shaft supports while the 53 and 54 are rigidly mountedon those arms: and through their adjusting screws 51 and 52 as limiting means for limitinghthe extent. of. making ofthe arms .45and 46-onsaid shafts and therefore limit the rocking of the muller wheels 47and'48,

The entire-muller wheellsuphorts and adjustarms 64 and 65, which respectively carry the vertically-disposed scraper supports 66 and 6'1" which are attached to the arms by the clamps 68 and 69 and bolts 70.

The support 66 carries the scraper '71 and the arm 67 carries the scraper .72. The scraper '72 is closer to the periphery of the pan, due to the laterally-extending portions 73 of the support 67. Both scrapers -71 and "12 are adjustabl'y mounted on their supports by the bolts 74 and each of them has removable scraping edges 75.

' The sleeve 62 carries another arm '16, to the free end of which is attached a scraper support 77 clamped thereto with the clamp '78 and bolts 79." This scraper support carries the scraper 80 through the bolts 81.

It will be noted that the scraper just mentioned is disposed from a point adjacent the column 10- to a point half way across the face of one of the mullers. The other two scrapers 71 and '72 are located on the opposite sidesof the shaft 6. The

outer scraper 72 engages the sidewall of the pan or closely adjacent to it while the scraper "71 is within the scraper '12 and covers a zone on the bottom of-the pan adjacent to the zone covered by the scraper 71. The sand or other material being mulled is thus subjected to scraping action and to the turning action of the scrapers throughout its entire body and the sand is being constantly moved into the path of the mullers and new faces of the sand particles are being presented to the mulling surfaces, while the mullers themselves not only can engage the sand but can ride over any portions of the sand that cannot be otherwise satisfactorily mulled. The extent of this-vertical movement of the mullers is limited by the set screws 51 and 52. Likewise, the scrapers 71 and '72 are permitted rocking vertical movement limited by the set screw 58.

The gate 29 being located on the outer portion of the panwhere thesand that has been completely mulled will be thrown by the movement of the muller and centrifugal force is thus in position to receive and permit the exit of that portion of the sand that has been completely treated. The scrapers 71 and 72 cooperate for that purpose and facilitate the discharge of such sand through the opening 29. By this cooperation between the scrapers and the mullers the completed sand can be discharged at intervals without disturbing the sand interiorly located which, may not have been fully completed in its treatment or, which has not yet had time for its This arm 59 is bifurcated having inner. spaced ends 59a and 59b and outer diverging.

said driving shaft, shafts mounted in each supporting member, muller Wheels, means mounted on eachshaft for supporting a muller wheel, said supporting means consisting of arms extending on both sides of said shaft, one of said armshaving means for mounting amuller wheel, a stationary member extending on the opposite side of the shaft of saidmuller supporting arm. and in a position above said other arm, and said other arm having'at least a portion in alignment with said stationary member and being so located as to contact .with said stationary member for limiting vertical movement of said muller wheel. '2; In a muller, a pan, a central driving shaft, a plurality of. supporting members extending from said driving shaft, shafts mounted in each supporting member,.muller wheels, means mounted on each shaft for supporting a muller wheel, said supporting means consisting of arms extending on both'sides of said shaft, one of said arms having means for mounting-amuller'wheel, a; stationary member extending onthe -.opposite side of the shaft of said muller supporting-arm and'in a positionabove said other arm, said other arm'haw ing at least a portion alignment with said stationary member and being so located as to contact said stationary member for limiting vertical movement of a V muller wheel, and adjustable means mounted on said supporting means for adjusting the limitsof vertical "movement of said muller wheels. H Y

3'. In a muller, a mullerpan havingfa shaft support with achamber thereln,-a lowerandan upper thrust bearing in the chamber, a driving shaftextending upwardly therethrough engaging the lower thrust bearing in the chamber, and the upper thrust bearing in' the chamber, animperforate cap on the chamber'jforming a sealing connection therewith, said cap having means for supporting the outer raceway ofthe upper thrust 1 15 shaft throughthe top thereof to the respective portions; of the chamber, a sleeve mounted on 20 said shaft and spaced from said cap, said sleeve having means for supporting a plurality of mullers, and a skirt extending downwardly from said sleeve below the bottom of saidcap for preventing the entrance of foreign'mate'rial to said chamher between said cap and chambenand between said cap and said shaft. 4

4. In a muller, a muller pan having a shaft support with a chamber therein, alower and an upper thrust bearing in the chambena driving shaft extending upwardly therethrough' engaging the lower thrust bearing in the chamber, and the upper thrust bearing in the chamber, an imperforate cap on the chamber forming a sealing connection therewith, said cap having means for supporting the outer raceway of the upper thrust bearing, means between said bearings for dividing the chamber into upper and lower portions,

a sleeve mounted'on said shaft-and spaced from said cap, said sleeve having means for supporting 140,

a plurality of mullers, and a skirt extending downwardly from said sleeve below the bottom of said cap for preventing the entrance of foreign material to said chamber between said cap and chamber, and between said cap and said shaft.

5. In a muller, a muller pan having a shaft sup port with a chamber therein, a lowerand an upper, thrust bearing in the chamber, a driving shaft extending i upwardly therethrou'gh engaging the lower'thrust bearing in 'the chamber, and

the upper thrust bearing in the chamber, and an imperforate cap on the chamber forming a sealing connection therewith, said cap having means for supporting the outer raceway of the upper thrust bearing, a sleeve mounted on said shaft and spaced from said cap, said sleeve having means for supporting a plurality of mullers, and 

